Share your experience!
I tried to unlock the boot loader for my xperia m. But just after finishing the process it got into a bootloop. I couldnt check wether the bootloader is unlocked or not as i couldnt start up my phone
plz help me.... 
oops you could try using PCC to perform a repair but if you have unlocked your bootloader it will fail - Leaving one option, you will need to use Flashtools and try relocking your bootloader via the BLU title or manually flash your device again using Flashtools and a .ftf firmware file most likely found on XDA
To perform a system repair using Pc Companion
Switch off your phone and unplug from Pc (Hold volume up and power for around 10 seconds)
Start PC Companion and select Support zone then Update my phone/tablet then in Blue Repair my phone/tablet and follow the onscreen instructions - When prompted connect your phone still switched off holding volume down or back button - This should start the repair or reformat process
If you are using Windows 8/8.1 or a 64bit operating system then adjust the settings for PC Companion and run in compatibility mode and chose Windows 7 or XP
Thanks Thommo, but I already tried repairing my phone using the PC companion. That didn't work.
I think my bootloader is locked because I don't see pink LED light on startup.
If your bootloader is locked then the repair should work - Your only other option is to manually flash device as above using a .ftf firmware file and if that fails then you could have hard bricked your device, but I think you don't have the drivers installed
I want to unlock my bootloader but its failed again and again and in last it gone in boot loop mood.
It doesn't work and in phone was countinue playing boot animation.
i triwd to unlock my bootloader throught commant prompt using my unlock key.
its show me in commant prompt "command not allowed".
I want to unlock my bootloader in flash tool but it say........